Although CaCO₃ is a naturally available, inexpensive, abundant and extensively used chemical in various industries, to date, most of its conversions liberate CO₂ into the atmosphere, which accounts for about 5–6% of global anthropogenic CO₂ emission. Herein, the first synthesis of calcium formate (CF) by hydrogenation of an aqueous mixture of CaCO₃ and CO₂ using a heterogeneous catalyst in an unconventional CO₂ reducing manner is reported. The phosphine-based heterogenized Ru catalyst efficiently converts CaCO₃ into CF with good selectivity (>99%) and is readily separated from the reaction product, resulting in promising recycling ability. Thus, this work provides a promising strategy for the design of green and sustainable conversion of carbonate minerals in industry.

中文翻译：

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石灰石的环保型上转化为高附加值的甲酸钙

尽管CaCO ₃是各种行业中天然存在的廉价，廉价，丰富和广泛使用的化学物质，但迄今为止，其大多数转化将CO ₂释放到大气中，约占全球人为CO ₂排放量的5–6％。在本文中，报道了使用多相催化剂以非常规的CO ₂还原方式通过将CaCO ₃和CO ₂的含水混合物氢化来首次合成甲酸钙（CF）。膦基异质Ru催化剂可有效转化CaCO ₃以良好的选择性（> 99％）将其转化为CF，并很容易与反应产物分离，从而产生有希望的再循环能力。因此，这项工作为工业中碳酸盐矿物的绿色和可持续转化设计提供了一种有希望的策略。